Don't go with Circupool is all I can say. We have had one for 4 months. It is producing NO chlorine. We have tried talking to them. They blame it on everything but their unit. We spent months getting all chemistry readings COMPLETELY normal because that's the only way they would believe their unit was the problem only to have them tell us it must not be a big enough unit for our pool. Our pool is 22,000 gallons. It is the rj30 rated for 30,000 and we have been running it 12 hours a day at 80% to try and produce enough chlorine. We put a valve in just downstream to the pool to prove it wasn't producing chlorine but their techs are like broken records saying if we see a cloud in the cell, it must be producing chlorine despite a 0 reading on all strips and at Leslie's . Even if the unit isn't big enough, a reading directly off the cell should show chlorine. They even replaced the cell which worked for 1 1/2 weeks only to go to 0 again. Now they say that even though it is a 7 year warranty, they will only give us an 80% refund after running it for 4 months and arguing with them 3 of the 4 months.